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    D1上ST7701S RGB显示绿屏问题

    D1系列-RISC-V
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    • A
      alvinlbl LV 4 last edited by

      有没有哪位大神遇到过这个问题?
      微信截图_20220613234920.png

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      • YuzukiTsuru
        柚木 鉉 LV 9 last edited by

        检查一下初始化initcode对不对,然后硬件RGB连接对不对

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        • A
          alvinlbl LV 4 @YuzukiTsuru last edited by

          @yuzukitsuru 接线没问题。
          参考官方文档截屏,导出的图像是正常的

          echo 0 > /sys/class/disp/disp/attr/disp
          echo /data/filename.bmp > /sys/class/disp/disp/attr/capture_dump
          

          使用colorbar,显示不正常

          echo 0 > /sys/class/disp/disp/attr/disp
          echo 8 > /sys/class/disp/disp/attr/colorbar
          

          重新对LCD初始化就正常了。

          mount -t debugfs none /sys/kernel/debug;
          cd /sys/kernel/debug/dispdbg;
          
          echo suspend > command; echo disp0 > name; echo 1 > start
          echo resume > command; echo disp0 > name; echo 1 > start
          
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          • YuzukiTsuru
            柚木 鉉 LV 9 @alvinlbl last edited by

            @alvinlbl 检查uboot的屏幕初始化参数

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            • A
              alvinlbl LV 4 @YuzukiTsuru last edited by

              @yuzukitsuru uboot和内核的st7701s驱动是一样的。dts也是一样的

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              • Y
                YterAA LV 7 last edited by

                brandy-2.0/u-boot-2018/configs/sun20iw1p1_defconfig 注释掉 #CONFIG_DISP2_SUNXI=y,使用kernel初始化屏幕测试

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                • A
                  alvinlbl LV 4 @YterAA last edited by

                  @yteraa 关掉uboot的初始化,显示正常。但不清楚uboot哪里有问题

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                  • M
                    ming899 LV 3 last edited by

                    老铁,请问这个问题解决了么?

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                    • YuzukiTsuru
                      柚木 鉉 LV 9 @ming899 last edited by YuzukiTsuru

                      @ming899 uboot的屏幕 LCD_WRITE_COMMAND 初始化里加一个delay

                      //three line 9bit mode
                      static void LCD_WRITE_DATA(u32 value)
                      {
                      	u32 i;
                      	TL032FWV01_spi_cs_0;
                      	TL032FWV01_spi_sdi_1;
                      	TL032FWV01_spi_scl_0;
                      	sunxi_lcd_delay_us(10);
                      	TL032FWV01_spi_scl_1;
                      	for (i = 0; i < 8; i++) {
                      		sunxi_lcd_delay_us(10);
                      		if (value & 0x80)
                      			TL032FWV01_spi_sdi_1;
                      		else
                      			TL032FWV01_spi_sdi_0;
                      		value <<= 1;
                      		TL032FWV01_spi_scl_0;
                      		sunxi_lcd_delay_us(10);
                      		TL032FWV01_spi_scl_1;
                      	}
                      	sunxi_lcd_delay_us(10);
                      	TL032FWV01_spi_cs_1;
                      }
                      
                      static void LCD_WRITE_COMMAND(u32 value)
                      {
                      	u32 i;
                      	sunxi_lcd_delay_ms(10);  // 延时一下
                      	TL032FWV01_spi_cs_0;
                      	TL032FWV01_spi_sdi_0;
                      	TL032FWV01_spi_scl_0;
                      	sunxi_lcd_delay_us(10);
                      	TL032FWV01_spi_scl_1;
                      	for (i = 0; i < 8; i++) {
                      		sunxi_lcd_delay_us(10);
                      		if (value & 0x80)
                      			TL032FWV01_spi_sdi_1;
                      		else
                      			TL032FWV01_spi_sdi_0;
                      		TL032FWV01_spi_scl_0;
                      		sunxi_lcd_delay_us(10);
                      		TL032FWV01_spi_scl_1;
                      		value <<= 1;
                      	}
                      	sunxi_lcd_delay_us(10);
                      	TL032FWV01_spi_cs_1;
                      }
                      
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